<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>双飞翼布局</title>
    <style type="text/css">
        .left,
        .main,
        .right {
            float: left;
            min-height: 130px;
            text-align: center;
        }
        
        .left {
            margin-left: -100%;
            background: #138686;
            width: 200px;
        }
        
        .right {
            margin-left: -300px;
            background-color: #1b4887;
            width: 300px;
        }
        
        .main {
            background-color: #6daca7;
            width: 100%;
        }
        
        .content {
            margin: 0 300px 0 200px;
        }
    </style>
</head>

<body>
    <div class="container">

        <div class="main">

            <div class="content">main</div>
        </div>

        <div class="left">left</div>

        <div class="right">right</div>
    </div>
</body>

</html>